Wednesday, February 24, 2010
Wednes-Day 1
Bio - We didn't finish all of the objectives yet so you do not have to hand in the following objective answers:
#'s 18, 21, and 22.
For #17, just explain which BLOOD TYPES will be accepted and which blood types will be rejected by a given RECEIVER of the blood. Make sure that you cover at least types A, B, AB, and O (you can do the Rh + and - , if you want to master that). Rh antigens are not on this test nor the Regents.
Don't worry about the organ transplant part of the question, though the ANSWER to that is the same as that for the blood types: people with different blood types typically ALSO have different antigens on their organ cells so the organ might be attacked by existing antibodies in the organ receiver.
We discussed leukemia- the disease that occurs when leukocytes/white blood cells turn into cancer cells via mutation or expression of built-in cancer genes. Cancer cells sap the body of nutrients/energy because they are dedicated to just making more of themselves without doing any other function.
We discussed the difference between a primary immune response (the FIRST time that you are exposed to a given pathogen) and the faster, better SECONDARY immune response (the NEXT and FUTURE times that you are exposed to the SAME pathogen) during which you already have antibodies made against that specific pathogen which will immediately be bound and marked for death by phagocytosis.
AP Chem - we finished two problems in which we predicted the NET favored direction of a reaction from initial conditions as the reaction proceeded towards equilibrium. By comparing K to Q, we can see whether the current conditions have relatively higher or lower product concentrations than those that exist at equilibrium.
We then did our FIRST major equilibrium problem type, where we SOLVED for the actual concentrations of ALL reactants and products given:
1. the initial concentrations
2. the BALANCED stoichiometric equation (for the "C" line of the ICE table!)
3. the equilibrium constant
There was only one unknown, the relative change in molarity of the reactants and products, which we solved for using a calculator or graphing program.
AP Chem - we finished two problems in which we predicted the NET favored direction of a reaction from initial conditions as the reaction proceeded towards equilibrium. By comparing K to Q, we can see whether the current conditions have relatively higher or lower product concentrations than those that exist at equilibrium.
We then did our FIRST major equilibrium problem type, where we SOLVED for the actual concentrations of ALL reactants and products given:
1. the initial concentrations
2. the BALANCED stoichiometric equation (for the "C" line of the ICE table!)
3. the equilibrium constant
There was only one unknown, the relative change in molarity of the reactants and products, which we solved for using a calculator or graphing program.
# posted by C @ 1:44 PM 
